<template>
  <el-menu 
    default-active="1-4-1"
    class="el-menu-vertical-demo" 
    @open="handleOpen" 
    @close="handleClose" 
    :collapse="isCollapse"
    background-color="#545c64"
    text-color="#fff"
    active-text-color="#ffd04b"
    >
    <h3>{{ isCollapse ? "后台" : "通用后台管理系统"}}</h3>
    <el-menu-item @click="jumpToPage(item)" v-for="item in noChildren" :key="item.name" :index="item.name">
      <i :class="`el-icon-${item.icon}`"></i>
      <span slot="title">{{ item.label }}</span>
    </el-menu-item>
    <el-submenu v-for="item in hasChild" :key="item.label" :index="item.label">
      <template slot="title">
        <i :class="`el-icon-${item.icon}`"></i>
        <span slot="title">{{ item.label }}</span>
      </template>
      <el-menu-item-group v-for="sub in item.children" :key="sub.path">
        <el-menu-item @click="jumpToPage(sub)" :index="sub.name">{{ sub.label }}</el-menu-item>
      </el-menu-item-group>
    </el-submenu>
  </el-menu>

</template>


<style lang="less" scoped>
  .el-menu-vertical-demo:not(.el-menu--collapse) {
    width: 200px;
    min-height: 400px;
  }
  .el-menu {
    height: 100vh;
    border-right: none;
    h3 {
      text-align: center;
      font-size: 16px;
      line-height: 48px;
      color: #fff;
      font-weight: 400;
    }
  }
</style>

<script>
import Cookie from 'js-cookie';
  export default {
    data() {
      return {

      };
    },
    methods: {
      handleOpen(key, keyPath) {
        console.log(key, keyPath);
      },
      handleClose(key, keyPath) {
        console.log(key, keyPath);
      },
      jumpToPage (item) {
        // if(this.$route.path !== item.path && !(this.$route.path === "/home" && (item.path === "/"))) {
        // if(true) {
          this.$router.push(item.path);
        // }
        this.$store.commit("selectMenu",item);
      }
    },
    computed: {
      noChildren() {
        return this.menuData.filter(item => !item.children);
      },
      hasChild () {
        return this.menuData.filter(item => item.children);
      },
      menuData() {
        // 判断当前数据，如果没有就从Cookie中获取
        return JSON.parse(Cookie.get('menu')) || this.$store.state.tab.menu;
      },
      isCollapse() {
        return this.$store.state.tab.isCollapse
      }
    }
  }
</script>